Modified soft tissue cast for fixed partial denture: a technique

Abstract

In process of fabrication of a fixed partial denture, dies are trimmed to expose margins of the preparations. The need for the soft tissue cast is quite evident as the soft tissue emergence profile that surrounds the prepared tooth is destroyed in the process of fabrication. This article describes a modified technique to fabricate the soft tissue cast for the conventional fixed partial denture. The impression made with the polyvinylsiloxane was first poured to prepare the die cast. After retrieval of the cast, the same impression was poured second time with the resin based resilient material to cover the facial and proximal gingival areas. The remaining portion of the impression was poured with the gypsum material. This technique does not require additional clinical appointment, second impression procedure, technique sensitive manipulations with impression, or cumbersome laboratory procedures. The simplicity of this technique facilitates and justifies its routine use in fabrication of the fixed partial denture.

Precise Reproduction of Soft Tissue Structure around the Pontic Area Using Computer‐Aided Design and Manufacturing

“…Then, the pontic base can be manually built‐up with porcelain on the gingival model. As a result, the final product could differ in quality according to the dental laboratory technician's skill …”

“…This approach could lead to an additional adjustment or could necessitate porcelain add‐on to the pontic base, thereby requiring additional appointment time for the patient . Precise information of the soft tissue could be transferred to the dental laboratory using an ovate pontic index; however, those techniques require an additional clinical appointment …”

“…8 Precise information of the soft tissue could be transferred to the dental laboratory using an ovate pontic index; however, those techniques require an additional clinical appointment. [9][10][11] In this article, a superimposing technique to reproduce a precise soft tissue structure around the pontic area using a CAD/CAM technique is introduced. Technique 1.…”

Accuracy of Multiple Pour Cast from Various Elastomer Impression Methods

“…The favorable prognosis of cast restorations is mainly dependent on the well-adapted margins [3]. The multiple pours of the dental impression are required in various situations ranging from inadvertent damage to verification of contact and emergence profile on intact cast [10]. The impression materials and methods that are capable of providing dimensionally accurate die on repeated pour are great advantage to clinicians and laboratory technician.…”

Transferring Conditioned Partially Edentulous Ridge Form to a Master Cast

“…Some other advantages of this approach include: (1) maintenance of the esthetic pattern set by interim prostheses; (2) lack of trust n the clinician's ability to pour the low shrinkage acrylic resin immediately or to have it poured in a relatively short period of time; and (3) reduction of the ceramic adjustment step by reducing the microcrack propagation rates . Examining the disadvantages and advantages of each option, it can be stated that: (1) additional time is required; (2) stability impression material is expensive; and (3) the technique is complex …”